BABLITCH, J.
This is an appeal from a judgment and order of the circuit court for Dane County entered pursuant to the Wisconsin Arbitration Act, ch. 298, Stats., confirming in all respects an arbitration award in favor of the plaintiff Teaching Assistants Association (TAA). The award orders the defendants-appellants (hereafter referred to as “university”) to bargain collectively with the TAA as the exclusive representative of all teaching assistants employed by the University of Wisconsin-Madison on the subject of wages, among other subjects; to cease and desist from certain practices which the arbitrator found to be in violation of labor agreements between the parties; and to make whole all teaching assistants who incurred financial losses as a result of the university’s failure to implement during the 1977-78 school year an across-the-board, seven percent pay increase for teaching assistants in conformity with its practice in prior years.
On appeal the university raises eleven separate issues and many subissues, most of which concern the legal power of the university to enter into collective bargaining agreements with unclassified state employees and agreements with respect to wages absent express statutory authority. Despite the importance of these issues, we are compelled to conclude that this case must be reversed for two interrelated threshold reasons which preclude this court from reaching the merits of the dispute.
Even if the university has the power to enter a collective bargaining agreement with the TAA, and even if the agreements involved in this suit could be construed as requiring the university to bargain the issue of wages, courts do not have unlimited power to enforce such agreements. Courts can act only within the scope of the [495]*495powers conferred upon them by statutes and the constitution of this state, and can exercise those powers only when they have been properly invoked. This case presents a unique test of those powers.
This is a lawsuit by unclassified state employees seeking the protection of the Wisconsin Arbitration Act against a state agency, the university. The legislature has expressly withheld the protection of the Wisconsin Arbitration Act from unclassified state employees. Other statutes permitting lawsuits against the state under certain conditions were not invoked, and the conditions which are prerequisite to the court’s power to act under those statutes were not complied with. Courts therefore do not have the power to consider the contentions of either the TAA or the university in this action.
The Issues
In our view the dispositive issues on appeal are: (1) whether the circuit court had jurisdiction under ch. 298, Stats., or at common law to decide the merits of this lawsuit, and (2) whether the action is barred in any event by art. IV, sec. 27 of the Wisconsin Constitution, which embodies the doctrine of the state’s sovereign immunity from suit without the legislature’s express permission.
The TAA has not responded to the university’s contention that the circuit court had no power to act under ch. 298, Stats. Both parties address the difficult issue of sovereign immunity in a single paragraph of their briefs on this appeal, with but a single case citation each.
Courts are required by law to observe the limits of their powers and to inquire into their jurisdiction over an action, even if neither party raises the question.1 Because we conclude that the courts are without jurisdic[496]*496tion over this action, we may not address the many other issues raised on appeal.
Factual Background
In April 1969, the University of Wisconsin-Madison and the TAA entered into a “structure agreement” pursuant to which the TAA was recognized as the exclusive bargaining representative for all teaching assistants at the University of Wisconsin-Madison. The agreement provided that the collective bargaining relationship between the parties would be governed by secs. 111.80 to 111.94, Stats. (1969), which then comprised the entire State Employment Labor Relations Act (SELRA) regulating the employment relationship between classified state employees and the state.2 Since teaching assistants are unclassified state employees, they were not and are not presently covered by SELRA. Sec. 111.81 (15).
Section 111.91, Stats. (1969),3 excluded wages, as a mandatory subject of collective bargaining for state em[497]*497ployees.4 The structure agreement provided that “stipends and such other /elements of Teaching Assistant remuneration as are established at an all university or legislative level cannot be susceptible to collective bargaining culminating in a legally binding agreement,” and excluded those subjects from collective bargaining between the parties. It further provided that the parties would “meet and discuss” such subjects in an effort to arrive at a joint recommendation to be submitted to the appropriate decision-making bodies, and that both were free to “submit their own independent recommendations” concerning the same in the event no agreement could be reached. The parties agreed that in all other respects the collective bargaining relationship between them would be governed by SELRA, and that disputes concerning the interpretation of sec. 111.91, “as applied to the peculiar relationship between the TAA and the University,” were to be submitted to binding arbitration.5 The Board of Regents approved this structure agreement in April 1970.
[498]*498Pursuant to the structure agreement, the parties negotiated collective bargaining agreements covering various conditions of employment in the years following 1969. The 1976-77 agreement6 provided in part:
There shall be two classifications of teaching assistants based on seniority:
(a) an inexperienced teaching assistant
(b) experienced teaching assistant
An inexperienced teaching assistant shall be a teaching assistant with less than one and two-thirds (1%) semester-units of seniority.
The agreement further provided that experienced teaching assistants “shall be remunerated at the ‘experienced teaching assistant’ pay scale set by the Regents of the University of Wisconsin,” and established a system for calculating a teaching assistant’s movement from the inexperienced to the experienced pay category.7
On May 28, 1976, the parties executed an addendum to the structure agreement to provide a machinery for [499]*499handling allegations by either party “that the other has committed an act which, if the parties were covered by Section 111.90-.94 Wis. Stats. (1969), would be considered a prohibited practice.”8 (Emphasis supplied.) If informal accommodation could not be reached, the dispute was to be submitted to an arbitrator appointed by the Wisconsin Employment Relations Commission (WERC). The addendum provided:
The parties agree that the arbitrator’s award shall be final and binding but further agree that either party may appeal the arbitrator’s ruling in a prohibited practice case to County Court, as provided in Section 298, Wis. Stats.
Except as expressly provided herein, the parties agree that nothing in this section shall be construed as agreement to change the terms or coverage of the Structure Agreement of April 26, 1969. (Emphasis supplied.)
The record is silent as to whether the Board of Regents approved this addendum.
The parties agreed on May 28, 1976 to establish an “ad hoc advisory committee” to study teaching assistant remuneration during the 1976-77 school year. The committee of three teaching assistants, three members of the faculty, and three members of the university administration filed a report in January 1977, concluding that the combined effect of inflation and increased tuition fees had reduced the actual buying power of teaching assistant stipends by some twenty percent over the past five years. The report recommended increasing the [500]*500stipends and implementing certain tuition remission credits to offset these factors.
On June 28, 1976, the university administration unilaterally adopted a teaching assistant stipend schedule for the 1977-78 school year, and communicated this decision to the TAA. The plan maintained the “experienced-inexperienced” differential established in the then-effective labor agreement, but divided the “experienced” category into three subcategories or “levels” of teaching assistants who were to receive increasingly higher salaries for each additional year of experience on the Madison campus.
Upon receipt of the stipend schedule plan, the TAA communicated various objections to university officials. It also sought to place the plan and the underlying issues of wages and seniority levels on the bargaining table during the negotiations for a 1977-78 labor agreement which were then in progress. The university rejected this attempt, contending that it had never agreed to, and would not, bargain the subj ect of wages.
On September 18, 1977, the TAA filed a grievance against the university contending that its unilateral adoption of the stipend schedule violated the seniority clause of the labor agreement by setting four levels of pay rather than the two levels agreed to, and by employing criteria other than those specified in the labor agreement to differentiate between the three “experienced” categories of teaching assistants. On September 19, 1977, it filed a prohibited practice charge alleging that the university’s refusal to bargain the stipend schedule violated the structure agreement. Both the grievance and the prohibited practice charge were subsequently submitted to arbitration.9
On September 26, 1977, the TAA filed a civil complaint in the circuit court for Dane County, naming as [501]*501parties “The University of Wisconsin-Madison” and Glen Pound, “as Chancellor of the University of Wisconsin-Madison.” The complaint alleged the material provisions of the structure agreement and the labor agreement set forth above, the university’s adoption of the new stipend schedule, and the fact that grievance and prohibited practice charges had been filed. It further alleged that the university had refused to delay implementation of the new schedule pending arbitration proceedings, and asserted irreparable injury to the TAA as a result of that refusal. The complaint demanded relief in the form of a judgment granting temporary and permanent injunctions prohibiting the defendants from implementing the stipend schedule “insofar as it creates two additional levels” during the pendency of the action or until binding arbitration awards were issued. The complaint also demanded that the circuit court “retain jurisdiction of this cause pending compliance with the arbitration award.”10
The university, through the attorney general,11 moved to dismiss the complaint on behalf of both named defendants on the grounds, among others, that it failed to state a claim upon which relief can be granted; that the State of Wisconsin had not consented to be sued; that the plaintiff had not complied with the provisions of sec. 285.01, Stats., which governs the commencement of cer[502]*502tain types of suits against the state;12 that the University of Wisconsin-Madison is not a legal entity which can be sued; and that no service of the action had been made on the Board of Regents.
Neither the university’s motion to dismiss nor the TAA’s demand for injunctive relief were ever heard or determined by the trial court. The university’s brief on appeal states that the TAA “withdrew” its motion for injunctive relief when the parties submitted the dispute to arbitration.13
The arbitration hearing took place on October 25, 1977. The arbitrator issued the award against the university on November 19, 1977. On January 24, 1978, the TAA filed a motion in the circuit court for “an order pursu[503]*503ant to Chapter 298.09 Wis. Stats. for a judgment enforcing and confirming the award.” The motion stated that it was based, in part, “upon the verified Complaint heretofore filed in this Court.” A supporting affidavit alleged that on or about December 9,1977, the university had officially informed the TAA that it would not comply with the award.
The university, in turn, moved to vacate the award on the grounds that ch. 298, Stats., was inapplicable to the contracts; that the arbitrator had exceeded his powers; and that the doctrine of sovereign immunity bars a suit against the state “and plaintiff’s action should, therefore, be treated as an action for declaratory judgment against officials acting beyond their jurisdiction.”14
On April 14, 1978, the trial court issued a memorandum decision affirming the arbitrator’s award in part. Both parties filed motions to reconsider and clarify. On August 2, 1978, the court issued a decision affirming the award in its entirety. The court entered an order and judgment on September 25, 1978, from which this appeal was taken.
This case presents several complex procedural issues relating to the validity of the underlying action commenced by the TAA. These issues appear to have been abandoned by the parties after the TAA moved to enforce the arbitrator’s award.15 The trial court did not [504]*504rule on them. We therefore disregard them on this appeal.
Statutory Jurisdiction
We are compelled to agree with the university’s conclusion that the circuit court was without jurisdiction under ch. 298, Stats., to enforce the arbitrator’s award, though not for the reasons advanced by the university.
Section 298.09, Stats., provides that any party to an arbitration may apply to the court for an order confirming the award within one year after it is made. However, sec. 298.01 provides that ch. 298 “shall not apply to contracts . . . between employers and associations of employes, except as provided in section 111.-10.”16 Section 111.10, Stats.,17 is a part of the Employment Peace Act which provides for the arbitration of collective bargaining disputes between employers and [505]*505employees in the private sector only.18 Section 111.86 of SELRA19 provides that disputes “pertaining to the interpretation” of labor agreements between the state and its classified employees20 may be submitted to arbitration and that “[s]uch arbitration proceedings shall be governed by ch. 298.”
Teaching assistants are not classified state employees. There is no statute similar to secs. 111.10 and 111.86, Stats., covering unclassified state employees. Consequently the labor contracts at issue in this case are expressly excluded from the scope of the Wisconsin Arbitration Act, and the court had no jurisdiction under sec. 298.09, Stats., to enforce an award based on those contracts.
The trial court recognized that parties may not confer jurisdiction on a court by contractual agreement.21 It [506]*506held, nonetheless, that the parties’ agreement to be bound by the statutory arbitration proceedings rendered the judicial review provisions of sec. 298.09, Stats., applicable, relying on Madison v. Frank Lloyd Wright Foundation, 20 Wis.2d 361, 122 N.W.2d 409 (1963). We think this reliance was misplaced.
The contract in Frank Lloyd Wright Foundation provided that disputes regarding services provided to the City of Madison by an architectural firm would be submitted “in accordance with the provisions ... of the standard form of Arbitration Procedure of the American Institute of Architects.” 20 Wis.2d at 383, 122 N.W.2d at 420. The issue was whether the agreement to arbitrate was an agreement at common law, which was terminable at the will of either party prior to the entry of an award, or a statutory agreement enforceable under sec. 298.01, Stats. The court held the agreement to be statutory, and said:
Every contract that is subject to Wisconsin law and which contains an arbitration agreement, and which does not clearly negate the application of the provisions of the Wisconsin Arbitration Act, incorporates the provisions of that act and those provisions shall apply. Parties entering into a contract that is subject to Wisconsin law and which contains an arbitration agreement, may, as here, prescribe that the arbitration procedure of the American Institute of Architects (or of some other comparable authority) shall apply and the arbitration shall be considered subject to ch. 298, Stats. If one or more of the provisions of the agreed arbitration procedure is in conflict with the provisions of ch. 298, then the provisions of ch. 298 shall apply. 20 Wis.2d at 383-84, 122 N.W.2d at 421. [Footnotes omitted.]
Other cases have also held that ch. 298, Stats., applies where the agreement to arbitrate is silent on the applicability of ch. 298. See Stradinger v. City of White[507]*507water, 89 Wis.2d 19, 34-35, 277 N.W.2d 827 (1979); Reith v. Wynhoff, 28 Wis.2d 336, 340, 137 N.W.2d 33 (1965); Pick Industries, Inc. v. Gebhard-Berghammer, Inc., 262 Wis. 498, 504, 56 N.W.2d 97 (1952).
However, none of these cases involved “contracts between employers and employes, or between employers and associations of employes” which are expressly excluded from coverage under the act by sec. 298.01, Stats. In none of them did the parties attempt to confer subject matter jurisdiction on the courts which had been expressly withheld by the legislature. None of them involved a suit to enforce an arbitration award against the state or one of its arms or agencies. Consequently, none of these cases support the trial court’s determination that it had jurisdiction to enforce the award under ch. 298.22
The language of sec. 298.01, Stats., is plain. It provides that the chapter “shall not” apply to collective bargaining agreements except as the legislature specifically permits. No statute permits the enforcement of collective bargaining agreements between the state and its unclassified employees under ch. 298. We must therefore hold that those portions of the agreements between these parties which provide for the judicial enforcement of an arbitration award under ch. 298 are void, and that the court was without subject matter jurisdiction under that chapter to enter the order appealed from.
[508]*508
Common-Law Jurisdiction
Chapter 298, Stats., does not provide the exclusive vehicle for judicial enforcement of arbitration awards. Such awards are enforceable at common law in an action on contract. In such actions, the award is pleaded in the complaint, and is conclusive on the issues decided by the arbitrator within the limits of his jurisdiction. Pick Industries, Inc., 262 Wis. at 503. See also Stradinger, 89 Wis.2d at 34; Reith, 28 Wis.2d at 339.
This is not such an action. The complaint did not seek the judicial enforcement of a contract or of the arbitration award. It sought only an injunction against the implementation of the new stipend schedule pending arbitration proceedings and the court’s retention of an unspecified jurisdiction pending compliance with any future award. Both the complaint and the university’s motion to dismiss the same were in substance abandoned by the parties during the arbitration proceedings. The subsequent motions to confirm and vacate the arbitrator’s award could not confer common law jurisdiction on the court. Such jurisdiction must be invoked by process and cannot be invoked by a motion for an order as can proceedings under ch. 298, Stats. Stradinger, 89 Wis.2d at 34; Pick Industries, Inc., 262 Wis. at 503.
Further, even viewing this action most liberally in favor of the TAA, as a properly commenced common law action to enforce the award, we are required to hold that the action is barred by sovereign immunity for the reasons that follow.
Sovereign Immunity
The doctrine of sovereign immunity in this state derives from art. IV, sec. 27, of the Wisconsin Constitution, which provides:
[509]*509The legislature shall direct by law in what manner and in what courts suits may be brought against the state.
The supreme court has repeatedly, and as recently as January, 1980, construed this language to mean that the legislature has the “exclusive” right to consent to a suit against the state. Fiala v. Voight, 93 Wis.2d 337, 342, 286 N.W.2d 824, 827 (1980); Cords v. State, 62 Wis.2d 42, 49-50, 214 N.W.2d 405, 409 (1974). In Fiala, 93 Wis. 2d at 342-43, 286 N.W.2d at 827, the court stressed that consent would not be implied from legislation which was less than clear and express:23
“ ‘It is not disputed that it is an established principle of law that no action will lie against a sovereign state in the absence of express legislative permission. It is further established that when a sovereign permits itself to be sued upon certain conditions, compliance therewith is a jurisdictional matter, and a suit against the sovereign may not be maintained unless such conditions are complied with.’ ” (Emphasis in original.) [Quoting State ex rel. Martin v. Reis, 230 Wis. 683, 685, 284 N.W. 580, 581 (1939) and Kegonsa Jt. Sanit. Dist. v. City of Stoughton, 87 Wis.2d 131, 144-45, 274 N.W.2d 598, 604 (1979)].
[510]*510Fiala, 93 Wis.2d at 341, noted that in many prior cases the supreme court had expressed its disapproval of the state’s sovereign immunity from suit, had urged the legislature to abrogate this “antiquated” doctrine, and had itself abrogated the related judicially-created doctrine of governmental immunity from tort liability. See also Cords, 62 Wis.2d 42; Townsend v. Wisconsin Desert Horse Assoc., 42 Wis.2d 414, 167 N.W.2d 425 (1969); Forseth v. Sweet, 38 Wis.2d 676, 158 N.W.2d 370 (1968); Holytz v. Milwaukee, 17 Wis.2d 26, 115 N.W.2d 618 (1962). The supreme court held in Fiala, however, consistent with its prior holdings, that the Wisconsin Constitution vests exclusive control over suits against the state and its agencies in the legislature, not in the courts.
“The doctrine of procedural immunity as to the state itself should be removed, but this change is directed to the legislature. The judiciary cannot step in where the legislature has failed to act to commence a change in the state’s constitution.” Fiala, 93 Wis.2d at 341-42, 286 N.W.2d at 827 [quoting Cords, 62 Wis.2d at 48, 214 N.W.2d at 409].
This recent pronouncement by the supreme court adheres to one of the earliest constructions of the constitutional requirement of art. IV, sec. 27, Wisconsin Constitution, which was set forth in Chicago M. & St. P. Ry. v. State, 53 Wis. 509, 513, 10 N.W. 560, 561 (1881), and quoted with approval in Cords, 62 Wis.2d at 50, 214 N.W.2d at 409-10.
“. . . It is not self-executing, and manifestly was not so intended. Otherwise, the mandate would have been to the courts instead of the legislature, and the consent of the state to be sued for the same causes which would support actions against individual citizens, would have been expressly given. We are of the opinion, therefore, that an action of any kind directly against the state can[511]*511not be maintained in this or any other court, unless it is authorized by some statute of the state.” [Emphasis supplied.]
The TAA does not specify any statute under which this action to enforce an arbitration award against a state agency is expressly or implicitly authorized. It did not ground the action on any of the commonly utilized statutory mechanisms provided by the legislature for suits against the state such as ch. 227, Stats. (authorizing judicial review of administrative agency decisions and actions),24 or ch. 285, Stats, (authorizing suits against the state after the presentation to and rejection by the legislature of “claims” against the state) .25 Nor did it bring an action for declaratory relief against individual officers under the Declaratory Judgment Act, sec. 806.04, Stats., which, under Lister v. Board of Regents, 72 Wis.2d 282, 302-03, 240 N.W.2d 610 (1976), provides a limited exception to the rule prohibiting suits [512]*512against the state under certain circumstances not here present.26
The TAA contends that even if the principles of sovereign immunity are applicable, the university has waived the right to raise the defense. The TAA does not suggest any reason why the doctrine would not be applicable to this case,27 nor does it state the manner in which the claimed waiver occurred.
The sole authority offered in support of the TAA’s claim is Kenosha v. State, 35 Wis.2d 317, 151 N.W.2d 36 (1967). That case held that sovereign immunity is a “personal-jurisdictional defense” which must be raised or deemed waived, and that an individual state officer who had merely entered a general demurrer to a complaint for declaratory judgment had waived his immunity [513]*513from suit. 35 Wis.2d at 328, 151 N.W.2d at 42. See also Cords, 62 Wis.2d 42. Kenosha and Cords are inapplicable. The university moved to dismiss the complaint on the express ground of sovereign immunity immediately after it was commenced.
The university reiterated its claim of immunity, although it did so in a less than clearcut manner, in its motion to vacate the arbitrator’s award,28 and during the course of this appeal.29 It is possible to view these latter references to sovereign immunity as an attempt to limit the defense to that portion of the arbitrators’ award which orders financial restitution based on the university’s failure to implement the traditional seven percent pay raise. We know, however, of no authority permitting the partial assertion of the defense to selected issues in a lawsuit against the state and none has been cited by either party.
Assuming that the university attempted to waive the defense to a part of the lawsuit and voluntarily sought the court’s resolution of the underlying legal issues raised by the parties (and no such claim is made), we conclude the attempt must fail. No court has power to resolve disputes over which it has no subject matter jurisdic[514]*514tion.30 Such jurisdiction cannot be conferred by waiver, whether inadvertent or by design.31 In Kenosha, 35 Wis. 2d 317, the supreme court expressly found that the court had subject matter jurisdiction under the declaratory judgment act. No comparable statutory authority has been invoked in this case. Though courts have common law jurisdiction to enforce arbitration awards as a general matter, they are without jurisdiction to enforce the same against the state absent express legislative authorization. Chicago M. & St. P. Ry., 53 Wis. 509.
Finally, if the TAA’s assertion that sovereign immunity has been waived rests on the university’s agreement to submit to binding arbitration and judicial enforcement of any award, the claim is without foundation. A similar claim was made and rejected in Lister, 72 Wis.2d 282. In that case students brought a suit for declaratory judgment and damages claiming that they had been improperly classified as nonresidents and wrongfully required to pay tuition at nonresident rates under the applicable statute. A university regulation authorized appeal from adverse decisions by the regis[515]*515trar respecting residency status to a university “Committee on Appeals” and provided:
“The Committee constitutes the final appellate body within the University system. Any relief beyond that granted by the Committee must be sought through the Courts.” 72 Wis.2d at 294, 240 N.W.2d at 618.
The students contended that the regulation constituted a waiver of sovereign immunity and that the state was estopped from raising that doctrine in defense of the lawsuit. The court held:
As a general rule the legislature is the proper body to authorize suits against the state. An agency or officer of the state may not waive the state’s immunity from suit unless specifically authorized to do so. Since the statutory provisions granting certain powers to the Board of Regents contain no such authorization, the plaintiffs’ reliance on the document is misplaced. In addition, it appears that the principle of estoppel will not be applied to deprive a state of its sovereign rights. 72 Wis.2d at 294, 240 N.W.2d at 618-19. [Footnote omitted.]
Because no statute confers power on any university official to waive the defense of sovereign immunity, its agreement to the judicial enforcement of arbitration awards against it is void under Lister, 72 Wis.2d 282.
It may be that a court could determine the merits of this dispute in an action under ch. 227, Stats., to review decisions of administrative agencies, in an action under ch. 285, Stats., after the presentation to and rejection by the legislature of a claim against the state, or in a declaratory judgment action against state officials alleged to be acting in excess of their statutory powers.
Suit was not attempted within one of those alternatives (the availability of which we do not decide) and the legislature has not consented to any other method of enforcing arbitration awards against the state by un[516]*516classified state employees. Absent legislative authorization to sue, the courts are powerless to act. For these reasons the action must be dismissed.
By the Court. — Judgment and order reversed and remanded for proceedings consistent with this opinion.